Electric fuse.



J. A. TORNQUIST- ELECTRIC PUSH APPLICATION FILED JUNE 2 2, 1911.

1,003,6'7 3. Patented Sept. 19, 1911.

WMM/woon ML 771W 1 TES PA JOHN A.. TORNQUST, OF DAVENYORT, IOWA.

ELECTRIC FUSE.

Leeiie'ie.

Continuation of application filed March 29, 1910, Serial No. 552,259.

Specification of Lenerfs raient.

.ilntented Sept. il?, Miti.

This application filed Tune 22, i91.

. Serial No. 634,669.

! :ait/ whom it mary concern:

le it lmewn that l, dem: A.. rllonrcniis'r, :i animen ot the UnitedStates, residing nt i l.) wenport, Xenia, lieve invented certain new:ind useful linnovei'nents in Electric Fuses, et whieh the followingl is:iy specification.

'.lliis invention rela-tes to iniprovenients in elec-trie fre/les, thiszipplieiition beingn continnzition of my application for patent filedflllnrch 29, 910; Ser. No, 552,95).

The ninin objects oli thin invention. nre:

the eneneie harte of which may he used re pez wily.I the fuse elementproper :and ite` inelofs fr ng' or Carton being quickly new Sen'dileciwith, er disassembled from the other il it the effectiveness; of thet'nee cannot he Jdestrn'iyed by the unauthorized changing et the fuseelen'ient. Second to n'ovide :in inil l a 7 Q proved electric tullewinch is very innnle :uni

.economie-el in fst'riml-niew and. :it the ,winne time, one which is ve1 eliective.

.Furtheriolijects and objects relating te etrueturnlV Vdetails, willdefinitely appelli" "in the accompanying dine/ing, ifn'nling e part ofthis specification, in which:

Figure l is n side elevation, partially in iongitudinzilsection. on nline .correspoiulinn to line l-ml ot Fig. 'il ot my inn'iroved elec--fi. t)

trie frise. Fig. il is n longitiulinnl section on n line correspondingto line Bm-2 et Fig.

, l, the rivets t3 'tor securing the time elemente` in the easing' ere'nrton being' Shown in full lines. Fig. IU. is u, i'iersi'ieetive lviewot one of the terminal caps. Fig. lV is n penalmetive viewof the fuseelement und its inelmsing easing or Carton disnssen'ihled troni theoeps. Figi V is n pien View ot' one et the disksil.

In the drawing, Similar numerals; of reference .refer to Similar pin-tstlwouighout the several views, and the section-il views are takenlooking in the direction of the little arrows zit the ends of thesection lines.

Referring to the drawing1 i represents the "inse block or linee on which:ire mounted rei?, to provide on improved electric fuse,

Darts, and being permanently eoi'ineeted so nilient line terminals 2 forthe circuit wires in wliieli the infie interposed. terminals are oi1 theblade-switch type, lieing` t'ornicd ot resilient material and dieportedin eimetiiig; pairs to receive the ends of the tufee element l und thetese terminals 5 hetween theni, :is illustrnted.

The tnse eleu'ientl tie torined of ny thin strip of suitable nietnl oituniform thickness, but enntrneted or reduced :it n centi-:d point ne et(l. so that when the linee is blown or disrupted.. it ie disrupted etthis centrali point within the casing' T. The mining "l is a cylinder oteuitnlile insulating materiel, pret ei'nlily of liliei' in' impur in.'like mnterinl, which found not onliY eitective for the purpose. initehenn :n1-d Streng.

rthe fuse element t, is arranged cent1-All)Y through. the rzieingij topro-ject 'troni both endK thereof. und is perlnniufntly Secured thereinhy :nenne` et the rivets Si. whieh nre nrmnged tln'nugg'h the fuseelement und the cilinder :it eneh end. '.llxe ends ot the cylinder nreineiueefl und the tune element supported nggninst interni uun'enient hyniezinS et the clelia if), which :ne slotted nt l't to re eeive the l:use element. 'the disks l) :ire :in rnngcd :it ench end et theeviflindei.' on the inside et the rivets il, en that ,the disks nreretnined hy the rivets, ze; well ne the fuse elements. ily the: Simplenrrnnggement, the

fuse elemente nre )ieruinnently supportednnd retnincd in their eentriilpositions; in the miningijsf: tlmt in. they' cannot vhe reinoi'ed orehnnged withonl the deeitruetion er inntiln.- tion otf the parte. 'Thisif; of Very .great :nli rnnlnn'e, ne nl" course, the [nn-nose ot n fuseis to prevent the pziesnge et en excessive current. :and where the tufeeelement enn be 'readily elning'ed, cnreleh'fs #workmen trequentl'iIeuhetitute new l'ufee eleniente` oli unknown capacity, so that the inse,instead of heini; n safety devine, is n nnnnce ns it may enrry n muchlarger currentI than the lznnps or the inziehinery which it is Supposedto guard nre adapted for.

the terminal cups Il() :ire sleeved over vthe ends et the casing; 7 thelerniiinils The line ment being directly in contact with one of the lineterminals ateacli end.

The casing is effectively supported by The caps are freely removable,

casing inserted. It is vmy intention that the fuse element and itsinclosing casing, as shown in Fig. IV, shall be furnished by themanufacturer so that the terminal caps can be used repeatedly. Thisresults in a great saving to the'consun'ier, as the terminal caps arethe expensiveparts of a fuse,-- that is, they should be made of metaland be uninjured by lthe blowing of the fuse. Another advantage of thisconstruction is that in the the 'fuse element cannot bev renewed b y acareless workman or an unauthorized person without destroying` thecarton, or without such mutilation thereotl as will make it .obviousthat' the fuse element hnUY been tampered with. 'flic fuses, asassembled by the manufacturer, are, of course, )roperly measured as totheir carrying capacity and the capacity is indicated upon the fasing.

Ventilating openings 1Q are provided in the. caps l0, and the disks 9are provided with ventilating openings 13.

I have illustrated and described my invention in a very satisfactoryembodiment thereof, which is simple and economical in structure andpossesses the advantages sought.

I'am aware that certain variations in structural details are possiblewithout .departing from my invention, but as such variations will nodoubt be readilyunderstood by those skilled in the art to which thisinvention relates, I have not illustrated or described the same herein,but desire to be understood as claimingthe same specifically in the formillustrated, as well as broadly within the scope of the appendedclaims.4

Having thus described my invention, what I claim as new and-desire tosecure by Letters Patent is:

l. A fuse device comprising in combination, a cylinder of insulatingmaterial, cylindrical. metallic caps for the ends thereof and place theevent (if the blowing` of the fuse,

having slotted perforations through their ends and integral terminalblades extending therefrom, al relatively thinfblade-like fuse I'-proper and saidinsulating cylinder' and lying under each of said caps.2. A fuse device comprising in combination, a cylinder of insulatingmaterial, slot# ted insulating disks at each end of said 'cylinder, arelatively thin blade-like fuse element extending tl'irongh cylinder andslots in said disks and beyond the ends oi said cylinder, and pinstaking through said cylinder and tuse element between the ends oi saidcylinder and the respective disks.

3. A fuse device comprising in combination, a cylinder of insulatingmaterial, slotted insulating disks in cach end 'of said cylindcr, ablade-like fuse ,element extending through said cylinder and the slotsin said disk and projecting beyond the said cylin- -der, and pinsarranged through said fuse element and cylii'ider. the said fuse clementbeing secured to said cylinder and sup ported against longitudinalmovement by said pins and against lateral movement by said disks.

l. A fuse device comprising inl combination, a conmlcte cylinder oit'insulating material, a relatively thin blade-like fuse element arrangedcentrally in said casing to project from both ends thereof, means forpermanently supporting and securing said fuse element at both ends ofsaid cylinder, and cylindrical metallic caps for the end:A of saidcylinder having slots through which the ends of said fuse elementproject, and blade-like terminals extending therefrom, said terminals.being disposed at the sides of the said slots and being parallel withthe projecting ends of the fuse element, said caps and fuse elementbeing unconnected, said capsbeingl. freely removable from the saidcasing, for the purpose specified.

In witness whereof, I have hereuntoset my hand andv seal in the presenceof two witnesses.

JOHN A. Toi-iNoUisT. Y [as] Witnesses AUGUSTA Pnsoiin, MADGE M.MARriNnLLI.

